Conference Papers
*: Equal contribution
2024
[C139]. Mira Partha, Shubh Gupta, and Grace Gao, Robust 3D Map-Matching with Visual Environment Features for Neural City Maps, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2024), Baltimore, MD. Abstract submitted.
[C138]. Daniel Neamati, Shubh Gupta, Mira Partha, and Grace Gao, Neural City Maps for GNSS Shadow Matching, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2024), Baltimore, MD. Abstract accepted.
[C137]. Guillem Casadesus Vila and Grace Gao, Markov Decision Processes for Scheduling Lunar PNT Services, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2024), Baltimore, MD. Abstract submitted.
[C136]. Adyasha Mohanty and Grace Gao, Graph Neural Network Enhanced GNSS Tightly Coupled with Neural Radiance Field Maps for UAV Navigation, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2024), Baltimore, MD. Abstract submitted.
[C135]. Keidai Iiyama, Guillem Casadesus Vila, Marta Cortinovis, Kaila Coimbra, and Grace Gao, System-Level Comparison of Lunar Orbit Determination and Time Synchronization Methods, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2024), Baltimore, MD. Abstract submitted.
[C134]. Keidai Iiyama and Grace Gao, Autonomous LunaNet Fault Monitoring with Inter-satellite Links: A Rigidity-Based Approach, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2024), Baltimore, MD. Abstract submitted.
[C133]. Alan Yang, Tara Mina, Stephen Boyd, and Grace Gao, Gradient-Guided Coordinate Descent for Large-Scale Binary Spreading Code Optimization, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2024), Baltimore, MD. Abstract submitted.
[C132]. Tara Mina, Keidai Iiyama, and Grace Gao, Passive Lunar Surface Network-Based Orbit Determination and Time Synchronization of the Lunar Satellite Navigation System, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2024), Baltimore, MD. Abstract submitted.
[C131]. Kaila M. Y. Coimbra, Marta Cortinovis, Tara Mina, and Grace Gao, Single-Satellite Lunar Navigation via Doppler Shift Observables for the NASA Endurance Mission, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2024), Baltimore, MD. Abstract submitted.
[C130]. Marta Cortinovis, Tara Mina, and Grace Gao, Assessment of Single Satellite-based Lunar Positioning for the NASA Endurance Mission, IEEE Aerospace Conference, Big Sky, MT, March 2024. [paper][slides]
[C129]. Keidai Iiyama*, Guillem Casadesus Vila*, and Grace Gao, Contact Plan Optimization and Distributed State Estimation for Delay Tolerant Satellite Networks, IEEE Aerospace Conference, Big Sky, MT, March 2024. [paper] [slides]
[C128]. Alan Yang, Tara Mina, and Grace Gao, Fast Spreading Code Optimization Under Doppler Effects, ION International Technical Meeting (ION ITM 2024), Long Beach, CA, Jan 2024. [paper] [slides] [video]
[C127]. Adyasha Mohanty and Grace Gao, Fusing GNN Enhanced GNSS with Neural Radiance Fields for UAV Navigation, ION International Technical Meeting (ION ITM 2024), Long Beach, CA, Jan 2024. [paper] [slides] [video]
2023
[C126]. Marta Cortinovis, Keidai Iiyama, and Grace Gao, Satellite Ephemeris Approximation Methods to Support Lunar Positioning, Navigation, and Timing Services, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023. Best Presentation of the Session Award. [paper] [slides] [video]
[C125]. Daniel Neamati, Shubh Gupta, Mira Partha, and Grace Gao, Neural City Maps for GNSS NLOS Prediction, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023. Best Presentation of the Session Award. [paper] [slides] [video]
[C124]. Adyasha Mohanty and Grace Gao, Tightly Coupled Graph Neural Network and Kalman Filter for Improving Smartphone GNSS Positioning, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023, Best Presentation of the Session Award. [paper] [slides] [video]
[C123]. Mira Partha, Shubh Gupta, and Grace Gao, Neural City Maps: A Case for 3D Urban Environment Representations Based on Radiance Fields, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023, Best Presentation of the Session Award. [paper] [slides] [video]
[C122]. Asta Wu, Adyasha Mohanty, Anonto Zaman, and Grace Gao, Bounding GPS-Based Positioning and Navigation Uncertainty for Autonomous Drifting via Reachability, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023. Best Presentation of the Session Award. [paper] [slides] [video]
[C121]. Derek Knowles and Grace Gao, Detection and Exclusion of Multiple Faults using Euclidean Distance Matrices, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023, Best Presentation of the Session Award. [paper] [slides] [video]
[C120]. Ashwin V. Kanhere and Grace Gao, Fault-Robust GPS Spoofing Mitigation with Expectation-Maximization, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023, Best Presentation of the Session Award. [paper] [slides] [video]
[C119]. Isabella Torres and Grace Gao, Intent- and Fault-based Trajectory Prediction for Cooperative Localization and Collision Avoidance in Swarms, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023. [paper] [slides] [video]
[C118]. Tara Mina, Alan Yang, and Grace Gao, Designing Long GPS Memory Codes Using the Cross Entropy Method, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023. [paper] [slides] [video]
[C117]. Derek Knowles, Ashwin V. Kanhere, and Grace Gao, Localization and Fault Detection Baselines From an Open-Source Python GNSS Library, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023. [paper] [slides] [video]
[C116]. Adam Dai, Shubh Gupta, and Grace Gao, Neural Radiance Maps for Extraterrestrial Navigation and Path Planning, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023. [paper] [slides] [video]
[C115]. Alan Yang, Tara Mina, and Grace Gao, Spreading Code Sequence Design via Mixed-Integer Convex Optimization, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023. [paper] [slides] [video]
[C114]. Keidai Iiyama*, Guillem Casadeus Vila*, and Grace Gao, LuPNT: Open-Source Simulator for Lunar Positioning, Navigation, and Timing, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023. [paper] [slides] [code]
[C113]. Keidai Iiyama, and Grace Gao, Positioning and Timing of Distributed Lunar Satellites via Terrestrial GPS Differential Carrier Phase Measurements, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2023), Denver, CO, Sep 2023. [paper] [slides]
[C112]. Alan Yang, Tara Mina, and Grace Gao, Binary sequence set optimization for CDMA applications via mixed-integer quadratic programming, IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) 2023. [paper]
[C111]. Akshay Shetty, Adam Dai, Alexandros Tzikas and Grace Gao, Safeguarding Learning-Based Planners Under Motion and Sensing Uncertainties Using Reachability Analysis, IEEE International Conference on Robotics and Automation (ICRA) 2023. [paper] [video]
[C110]. Adam Dai, Tara Mina, Ashwin Kanhere, and Grace Gao, Spoofing-Resilient LiDAR-GPS Factor Graph Localization with Chimera Signal Enhancement, Proceedings of the IEEE/ION PLANS conference, Monterey, CA, April 2023. [paper] [slides] [code]
[C109]. Keidai Iiyama, Sriramya Bhamidipati, and Grace Gao, Terrestrial GPS Time-Differenced Carrier-Phase Positioning of Lunar Surface Users, IEEE Aerospace Conference 2023. [paper] [slides]
[C108]. Keidai Iiyama, Sriramya Bhamidipati, and Grace Gao, Precise Positioning and Timekeeping in Lunar Orbit via Terrestrial GPS Time-Differenced Carrier-Phase Measurements, Proceedings of the Institute of Navigation ITM conference (ION ITM 2023), Long Beach, CA, Jan 2023. [paper] [slides]
2022
[C107]. Sriramya Bhamidipati, Tara Mina, Alana Sanchez and Grace Gao, A Systematic Approach to the Design of Lunar Navigation and Communication System with Time-Transfer from Earth-GPS, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2022), Denver, CO, Sep 2022. Best Presentation of the Session Award. [paper] [slides] [video]
[C106]. Shubh Gupta, Ashwin V. Kanhere, Akshay Shetty, and Grace Gao, Designing Deep Neural Networks for Sequential GNSS Positioning, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2022), Denver, CO, Sep 2022. Best Presentation of the Session Award. [paper] [slides] [video]
[C105]. Daniel Neamati, Sriramya Bhamidipati, and Grace Gao, Set-Based Ambiguity Reduction in Shadow Matching with Iterative GNSS Pseudoranges, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2022), Denver, CO, Sep 2022. Best Presentation of the Session Award. [paper] [slides] [video]
[C104]. Derek Knowles*, Ashwin V. Kanhere*, Sriramya Bhamidipati, and Grace Gao, A Modular and Extendable GNSS Python Library, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2022), Denver, CO, Sep 2022. Best Presentation of the Session Award. [paper] [slides] [video] [code]
[C103]. Adyasha Mohanty and Grace Gao, Learning GNSS Positioning Corrections for Smartphones using Graph Convolution Neural Networks, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2022), Denver, CO, Sep 2022. [paper] [slides] [video]
[C102]. Shubh Gupta, Adyasha Mohanty and Grace Gao, Getting The Best of Particle and Kalman Filters: GNSS Sensor Fusion using Rao-Blackwellized Particle Filter, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2022), Denver, CO, Sep 2022. [paper] [slides] [video]
[C101]. Alana Sanchez and Grace Gao, Relativistic Time Transfer Error Correction for a Lunar Navigation Satellite System, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2022), Denver, CO, Sep 2022. [slides] [video]
[C100]. Ashwin V. Kanhere, Tara Mina, Akshay Shetty, and Grace Gao, Factor Graph-based Spoofing Mitigation using the Chimera Signal Enhancement, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2022), Denver, CO, Sep 2022. [paper] [slides] [video]
[C99]. Tara Mina, Ashwin V. Kanhere, Akshay Shetty and Grace Gao, GPS Spoofing-Resilient Filtering with Chimera and Self-Contained Odometry, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2022), Denver, CO, Sep 2022. [paper] [slides] [video]
[C98]. Amr Alanwar, Mahmoud Selim, Shreyas Kousik, Grace Gao, Marco Pavone and Karl H. Johansson, Safe Reinforcement Learning Using Black-Box Reachability Analysis, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) 2022. [paper]
[C97]. Adyasha Mohanty, Asta Wu, Sriramya Bhamidipati and Grace Gao, Precise Relative Positioning via Tight-Coupling of GPS Carrier Phase Measurements and Multiple UWBs, IEEE International Conference on Robotics and Automation (ICRA) 2022. [paper] [video]
[C96]. David Stier, Asta Wu, Adyasha Mohanty and Grace Gao, A Test Platform for UWB-Based Localization of Dynamic Multi-Agent Systems, IEEE International Conference on Robotics and Automation (ICRA) 2022. [paper] [slides] [video]
[C95]. Sriramya Bhamidipati, Keidai Iiyama*, Tara Mina* and Grace Gao, Time-Transfer from Terrestrial GPS for Distributed Lunar Surface Communication Networks, IEEE Aerospace Conference 2022. [paper] [slides]
[C94]. Sriramya Bhamidipati, Tara Mina and Grace Gao, A Case Study Analysis for Designing a Lunar Navigation Satellite System with Time-Transfer from Earth-GPS, Proceedings of the Institute of Navigation ITM conference (ION ITM 2022), Long Beach, CA, Jan 2022. [paper] [slides] [video]
2021
[C93]. Sriramya Bhamidipati, Tara Mina and Grace Gao, Design Considerations of a Lunar Navigation Satellite System with Time-Transfer from Earth-GNSS, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2021), St. Louis, MO, Sep 2021. Best Presentation of the Session Award. [paper] [slides] [video]
[C92]. Sriramya Bhamidipati, Shreyas Kousik and Grace Gao, Set-valued Shadow Matching using Zonotopes, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2021), St. Louis, MO, Sep 2021. [paper] [slides] [video]
[C91]. Adyasha Mohanty and Grace Gao, A Particle Filtering Framework for Tight GNSS-Camera Fusion using Convolutional Neural Networks, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2021), St. Louis, MO, Sep 2021. [paper][slides] [video]
[C90]. Adyasha Mohanty, Remy Zawislak, Sriramya Bhamidipati, and Grace Gao, Precise Relative Positioning for Tandem Drifting Cars, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2021), St. Louis, MO, Sep 2021. [paper] [slides] [video]
[C89]. Derek Knowles and Grace Gao, Euclidean Distance Matrix-based Rapid Fault Detection and Exclusion, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2021), St. Louis, MO, Sep 2021. Best Presentation of the Session Award. [paper] [slides] [video]
[C88]. Tara Mina, Ashwin V. Kanhere, Shreyas Kousik and Grace Gao, Continuous GPS Authentication with Chimera using Stochastic Reachability Analysis, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2021), St. Louis, MO, Sep 2021. [paper] [slides] [video]
[C87]. Ashwin V. Kanhere*, Shubh Gupta*, Akshay Shetty and Grace Gao, Improving GNSS Positioning using Neural Network-based Corrections, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2021), St. Louis, MO, Sep 2021. [paper] [slides] [video] [code]
[C86]. Akshay Shetty, Timmy Hussain and Grace Gao, Decentralized Connectivity Maintenance for Multi-robot Systems Under Motion and Sensing Uncertainties, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2021), St. Louis, MO, Sep 2021. Best Presentation of the Session Award. [paper] [slides] [video]
[C85]. Long Kiu Chung*, Adam Dai*, Derek Knowles, Shreyas Kousik and Grace Gao, Constrained Feedforward Neural Network Training via Reachability Analysis, Robotics: Science and Systems (RSS 2021) Robotics for People (R4P) Workshop, Jul 2021. [paper]
2020
[C84]. Sriramya Bhamidipati and Grace Gao, Integrity-driven Landmark Attention for GPS-Vision Navigation via Stochastic Reachability, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2020), St. Louis, MO, Sep 2020. [paper] [slides] [video]
[C83]. Shubh Gupta and Grace Gao, Data-Driven Protection Levels for Camera and 3D Map-based Safe Urban Localization, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2020), St. Louis, MO, Sep 2020. doi: 10.33012/2020.17698. [paper] [slides] [video]
[C82]. Adyasha Mohanty, Shubh Gupta and Grace Gao, A Particle Filtering Framework for Integrity Risk of GNSS-Camera Sensor Fusion, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2020), St. Louis, MO, Sep 2020. [paper][slides] [video]
[C81]. Tara Mina and Grace Gao, Designing Low-Correlation GPS Spreading Codes via a Policy Gradient Reinforcement Learning Algorithm, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2020), St. Louis, MO, Sep 2020. Best Presentation of the Session Award. [paper] [slides] [video]
[C80]. Akshay Shetty and Grace Gao, Trajectory Planning Under Stochastic and Bounded Sensing Uncertainties Using Reachability Analysis, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2020), St. Louis, MO, Sep 2020. [paper] [slides] [video]
[C79]. Sriramya Bhamidipati and Grace Gao, GPS Spoofing Mitigation and Timing Risk Analysis in Networked PMUs via Stochastic Reachability, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2020), St. Louis, MO, Sep 2020. [paper] [slides] [video]
[C78]. Shubhendra Chauhan and Grace Gao, Hardware-In-the-Loop GPS and PMU Integrated Datasets for the Power Grid Under GPS Spoofing Attacks, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2020), St. Louis, MO, Sep 2020. [paper] [slides] [video]
[C77]. Andrew Neish, Tyler Reid, Frank van Diggelen and Grace Gao, GNSS in the Classroom: Taking the Paralysis out of Analysis, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2020), St. Louis, MO, Sep 2020. [slides]
2019
[C76]. Ashwin V. Kanhere and Grace Gao, LiDAR SLAM Utilizing Normal Distribution Transform and Measurement Consensus, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2019), Miami, FL, Sep 2019. [paper] [slides] [code]
[C75]. Sriramya Bhamidipati and Grace Gao, SLAM-based Integrity Monitoring Using GPS and Fisheye Camera, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2019), Miami, FL, Sep 2019. [paper] [slides]
[C74]. Akshay Shetty and Grace Gao, Predicting State Uncertainty for GNSS-based UAV Path Planning Using Stochastic Reachability, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2019), Miami, FL, Sep 2019. [paper] [slides]
[C73]. Shubh Gupta and Grace Gao, Particle RAIM for Integrity Monitoring, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2019), Miami, FL, Sep 2019. [paper] [slides]
[C72]. Sriramya Bhamidipati and Grace Gao, Distributed Cooperative SLAM-based Integrity Monitoring Via a Network of Receivers, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2019), Miami, FL, Sep 2019. [paper] [slides]
[C71]. Siddharth Tanwar and Grace Gao, Multi-Epoch Multi-Agent Collaborative Localization Using Grid-based 3DMA GNSS and Inter-Agent Ranging, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2019), Miami, FL, Sep 2019. [paper] [slides]
[C70]. Tara Mina and Grace Gao, Devising High-Performing GPS Pseudo-Random Noise Codes Using Evolutionary Learning Algorithms, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2019), Miami, FL, Sep 2019. Best Presentation of the Session Award. [paper] [slides]
[C69]. Shubhendra Chauhan and Grace Gao, Vertical Protection Level Estimation for Direct Positioning Using a Bayesian Approach, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2019), Miami, FL, Sep 2019. [paper] [slildes]
[C68]. Akshay Shetty and Grace Gao, UAV Pose Estimation Using Cross-view Geolocalization with Satellite Imagery, Proceedings of the 2019 IEEE International Conference on Robotics and Automation (ICRA), Montreal, Canada, May 2019. [paper] [video] [data]
2018
[C67]. Ashwin V. Kanhere and Grace Gao, Integrity for GPS/LiDAR Fusion Utilizing a RAIM Framework, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2018), Miami, FL, Sep 2018. Best Presentation of the Session Award. [paper]
[C66]. Siddharth Tanwar and Grace Gao, Decentralized Collaborative Localization in Urban Environments Using 3D-Mapping-Aided (3DMA) GNSS and Inter-Agent Ranging, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2018), Miami, FL, Sep 2018. [paper]
[C65]. Sriramya Bhamidipati and Grace Gao, Multiple GPS Fault Detection and Isolation Using a Graph-SLAM Framework, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2018), Miami, FL, Sep 2018. [paper]
[C64]. Tara Mina, Sriramya Bhamidipati and Grace Gao, Detecting GPS Spoofing via a Multi-Receiver Hybrid Communication Network for Power Grid Timing Verification, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2018), Miami, FL, Sep 2018. [paper]
[C63]. Siddharth Tanwar and Grace Gao, Decentralized Collaborative Localization with Deep GPS Coupling for UAVs, Proceedings of the IEEE/ION PLANS conference, Monterey, CA, Apr 2018. [paper]
[C62]. Arthur Chu and Grace Gao, Vertical Integrity Monitoring with Direct Positioning, Proceedings of the IEEE/ION PLANS conference, Monterey, CA, Apr 2018. [paper]
[C61]. Sriramya Bhamidipati and Grace Gao, Simultaneous Localization of Multiple Jammers and Receivers Using Probability Hypothesis Density, Proceedings of the IEEE/ION PLANS conference, Monterey, CA, Apr 2018. [paper]
[C60]. Sriramya Bhamidipati, Tara Mina and Grace Gao, GPS Time Authentication against Spoofing via a Network of Receivers for Power Systems, Proceedings of the IEEE/ION PLANS conference, Monterey, CA, Apr 2018. [paper]
2017
[C59]. Sriramya Bhamidipati and Grace Gao, GPS Spoofer Localization for PMUs using Multi-Receiver Direct Time Estimation, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2017), Portland OR, Sep 2017. Best Presentation of the Session Award. [paper]
[C58]. Akshay Shetty and Grace Gao, Covariance Estimation for GPS-LiDAR Sensor Fusion for UAVs, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2017), Portland OR, Sep 2017. [paper]
[C57]. Arthur Chu and Grace Gao, Multi-Receiver Direct Position Estimation Tested on a Full-Scale Fixed-wing Aircraft, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2017), Portland OR, Sep 2017. [paper]
[C56]. Shubhendra Chauhan and Grace Gao, Joint GPS and Vision Estimation Using an Adaptive Filter, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2017), Portland OR, Sep 2017. [paper]
[C55]. Cara Kataria and Grace Gao, A Single Hemispiral Antenna for GNSS Interference Mitigation and Direction Estimation, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2017), Portland OR, Sep 2017. [paper]
2016
[C54]. Sriramya Bhamidipati, Yuting Ng and Grace Gao, Multi-Receiver GPS-based Direct Time Estimation for PMUs, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2016), Portland OR, Sep 2016. Best Presentation of the Session Award. [paper]
[C53]. Yuting Ng and Grace Gao, Direct Position Estimation Utilizing Non-Line-of-Sight (NLOS) GPS Signals, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2016), Portland OR, Sep 2016. [paper]
[C52]. Yuting Ng and Grace Gao, Computationally Efficient Direct Position Estimation via Low Duty-Cycling, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2016), Portland OR, Sep 2016. [paper]
[C51]. Enyu Luo, Xin Hui Fang, Yuting Ng and Grace Gao, Shinerbot: Bio-inspired Collective Robot Swarm Navigation Platform, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2016), Portland OR, Sep 2016. [paper]
[C50]. Yuting Ng and Grace Gao, Mitigating Jamming and Meaconing Attacks Using Direct GPS Positioning, in Proceedings of the IEEE/ION PLANS conference, Savanah GA, Apr 2016. Best Paper Award. [paper]
[C49]. Yuting Ng and Grace Gao, Joint GPS and Vision Direct Position Estimation, Proceedings of the IEEE/ION PLANS conference, Savanah GA, Apr 2016. [paper]
[C48]. Yuting Ng and Grace Gao, Robust GPS-Based Direct Time Estimation for PMUs, Proceedings of the IEEE/ION PLANS conference, Savanah GA, Apr 2016. [paper]
2015
[C47]. Yuting Ng and Grace Gao, Advanced Multi-Receiver Position-Information-Aided Vector Tracking for Robust GPS Time Transfer to PMUs, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2015), Tampa FL, Sep 2015. Best Paper of the Session Award. [paper]
[C46]. Yuting Ng and Grace Gao, Advanced Multi-Receiver Vector Tracking for Positioning a Land Vehicle, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2015), Tampa FL, Sep 2015. [paper]
[C45]. Akshay Shetty and Grace Gao, Vision-Aided Measurement Level Integration of Multiple GPS Receivers for UAVs, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2015), Tampa FL, Sep 2015. [paper]
[C44]. Derek Chen and Grace Gao, Robust MAV State Estimation Using an M-Estimator Augmented Sensor Fusion Graphs, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2015), Tampa FL, Sep 2015. [paper]
[C43]. Akshay Shetty and Grace Gao, Measurement Level Integration of Multiple Low-Cost GPS Receivers for UAVs, ION International Technical Meeting 2015, Dana Point, California, Jan 2015. [paper]
[C42]. Derek Chen and Grace Gao, Simultaneous State Estimation of UAV Trajectory Using Probabilistic Graph Models, ION International Technical Meeting 2015, Dana Point, California, Jan 2015. [paper]
[C41]. Daniel Chou, Yuting Ng and Grace Gao, Robust GPS-Based Timing for PMUs Based on Multi-Receiver Position-Information-Aided Vector Tracking, ION International Technical Meeting 2015, Dana Point, California, Jan 2015. [paper]
[C40]. Yuting Ng and Grace Gao, Multi-Receiver Vector Tracking Based on a Python Platform, ION International Technical Meeting 2015, Dana Point, California, Jan 2015. [paper]
2014
[C39]. Liang Heng, Daniel Chou and Grace Gao, Cooperative GPS Signal Authentication from Unreliable Peers, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2014), Tampa FL, Sep 2014. Best Presentation of the Session Award. [paper]
[C38]. Athindran Ramesh Kumar, Liang Heng and Grace Gao, GPS Privacy: Enabling Proximity-based Services While Keeping GPS Locations Private, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2014), Tampa FL, Sep 2014. [paper]
[C37]. Daniel Chou, Liang Heng and Grace Gao, Robust GPS-Based Timing for Phasor Measurement Units: A Position-Information-Aided Vector Tracking Approach, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2014), Tampa FL, Sep 2014. Best Presentation of the Session Award. [paper]
[C36]. Eliot Wycoff and Grace Gao , A Python Software Platform for Cooperatively Tracking Multiple GPS Receivers, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2014), Tampa FL, Sep 2014. [paper]
[C35]. Liang Heng and Grace Gao, Navigating Robot Swarms Using Collective Intelligence Learned from Golden Shiner Fish, Proceedings of the Collective Intelligence Conference (CI2014), Cambridge, MA, Jun 2014. [paper]
[C34]. Liang Heng, Jonathan Makela, Alejandro Dominguez-Garcia, Rakesh Bobba, William Sanders and Grace Gao, Reliable GPS-based Timing for Power System Applications: A Multi-Layered Multi-Receiver Approach, Proceedings of the 2014 IEEE Power and Energy Conference at Illinois (IEEE PECI 2014), Champaign, IL, Feb 2014. [paper]
2013
[C33]. Liang Heng and Grace Gao, Accuracy of Range-Based Localization Schemes in Random Sensor Networks: A Lower Bound Analysis, Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems (IEEE/RSJ IROS 2013), Tokyo, Japan, Nov 2013. [paper]
[C32]. Derek Chen, Liang Heng, Dan Jia and Grace Gao, Distributed Array of GPS Receivers for 3D Wind Profile Determination in Wind Farms, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2013), Nashville, TN, Sep 2013.Best Presentation of the Session Award. [paper]
[C31]. Liang Heng and Grace Gao, Networked GPS Approach to Tracking Marine Animal Schools, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2013), Nashville, TN, Sep 2013. [paper]
[C30]. Liang Heng, Todd Walter, Per Enge and Grace Gao, Overcoming RFI with High Mask Angle Antennas and Multiple GNSS Constellations, Proceedings of the Institute of Navigation GNSS+ conference (ION GNSS+ 2013), Nashville, TN, Sep 2013. [paper]
Previous years
[C29]. Grace Gao, Kaz Gunning, Todd Walter and Per Enge, Impact of Personal Privacy Devices for WAAS Aviation Users, Proceedings of the 25th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS 2012), Nashville, TN, Sep 2012. [paper]
[C28]. Liang Heng, Grace Gao, Todd Walter and Per Enge, GLONASS signal-in-space anomalies since 2009, Proceedings of the 25th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS 2012), Nashville, TN, Sep 2012. Best Presentation of the Session Award. [paper]
[C27]. Liang Heng, Grace Gao, Todd Walter and Per Enge, Automated Verification of Potential GPS Signal-In-Space Anomalies Using Ground Observation Data, Proceedings of the IEEE/ION PLANS conference, Myrtle Beach, SC, Apr 2012. [paper]
[C26]. Sam Pullen, Grace Gao, Carmen Tedeschi and John Warburton, The Impact of Uninformed RF Interference on GBAS and Potential Mitigations, ION International Technical Meeting 2012, Newport Beach, California, Jan 2012. [paper]
[C25]. Liang Heng, Grace Gao, Todd Walter and Per Enge, Statistical Characterization of GLONASS Broadcast Clock Errors and Signal-In-Space Errors, ION International Technical Meeting 2012, Newport Beach, California, Jan 2012. [paper]
[C24]. Grace Gao, Liang Heng, Todd Walter and Per Enge, Breaking the Ice: Navigating in the Arctic, Proceedings of the Institute of Navigation GNSS conference (ION GNSS 2011), Portland, Oregon, Sep 2011. Best Presentation of the Session Award. [paper]
[C23]. Liang Heng, Grace Gao, Todd Walter and Per Enge, Statistical Characterization of GLONASS Signal-In-Space Errors, Proceedings of the Institute of Navigation GNSS conference (ION GNSS 2011), Portland, Oregon, Sep 2011. [paper]
[C22]. Myungjun Choi, Juan Blanch, Dennis Akos, Liang Heng, Grace Gao, Todd Walter and Per Enge, Demonstrations of Multi-Constellation Advanced RAIM for Vertical Guidance using GPS and GLONASS Signals, Proceedings of the Institute of Navigation GNSS conference (ION GNSS 2011), Portland, Oregon, Sep 2011. [paper]
[C21]. Stefan Erker, Steffen Thoelert, Johann Furthner, Michael Meurer, Grace Gao, Liang Heng, Todd Walter and Per Enge, GLONASS K First in Orbit Signal in Space Analysis of Russian New Satellite Generation, Proceedings of the Institute of Navigation GNSS conference (ION GNSS 2011), Portland, Oregon, Sep 2011. [paper]
[C20]. Liang Heng, Grace Gao, Todd Walter and Per Enge, Statistical Characterization of GPS Signal-In-Space Errors, ION International Technical Meeting 2011, San Diego, California, Jan 2011. [paper]
[C19]. Patryk Jurkowski, Patrick Henkel, Grace Gao and Christoph Gunther, Integer ambiguity resolution with tight and soft baseline constraints for freight stabilization at helicopters and cranes, ION National Technical Meeting 2011, San Diego, California, Jan 2011. [paper]
[C18]. David Varodayan and Grace Gao, Redundant Metering for Integrity with Information-Theoretic Confidentiality, Proceedings of the IEEE International conference on Smart Grid Communications, SGC 2010, Gaithersburg, Maryland, Oct 2010. [paper]
[C17]. Grace Gao, Liang Heng, Gabriel Wong, Eric Phelts, Juan Blanch, Todd Walter, Per Enge, Stefan Erker, Steffen Thoelert and Michael Meurer, GPS in Mid-life with an International Team of Doctors, Analyzing IIF-1 Satellite Performance and Backward- Compatibility, Proceedings of the Institute of Navigation GNSS conference (ION GNSS 2010), Portland, Oregon, Sep 2010. Best Presentation of the Session Award. [paper]
[C16]. Liang Heng, Grace Gao, Todd Walter and Per Enge, GPS Signal-in-Space Anomalies in the Last Decade, Data Mining of 400,000,000 GPS Navigation Message, Proceedings of the Institute of Navigation GNSS conference (ION GNSS 2010), Portland, Oregon, Sep 2010. [paper]
[C15]. Grace Gao, Haochen Tang, Juan Blanch, Jiyun Lee, Todd Walter and Per Enge, Methodology and Case Studies of Signal-in-Space Error Calculation Top-down Meets Bottom-up, Proceedings of the Institute of Navigation GNSS conference (ION GNSS 2009), Savannah, Georgia, Sep 2009. [paper]
[C14]. Patrick Henkel, Grace Gao, Todd Walter and Christoph Gunther, Robust Multi-Carrier, Multi-Satellite Vector Phase Locked Loop with Wideband Ionospheric Correction and Integrated Weighted RAIM, ENC Global Navigation Satellite Systems Conference 2009, Naples, Italy, May 2009. [paper]
[C13]. Grace Gao, Dennis Akos, Todd Walter and Per Enge, Understanding the GIOVE-B Broadcast Codes of the Galileo System, IEEE Asilomar Conference on Signals, Systems and Computers, Pacific Grove, California, Oct 2008. [paper]
[C12]. Shankar Ramakrishnan, Grace Gao, David De Lorenzo, Todd Walter, Per Enge and Dennis Akos, Design and Analysis of Reconfigurable Embeded GNSS Receivers Using Model-Based Design Tools, Proceedings of the Institute of Navigation GNSS conference (ION GNSS 2008), Savannah, Georgia, Sep 2008. Best Presentation of the Session Award. [paper]
[C11]. Grace Gao, Alan Chen, Sherman Lo, David De Lorenzo and Per Enge, Compass-M1 Broadcast Codes and their Application to Acquisition and Tracking, ION National Technical Meeting 2008, San Diego, California, Jan 2008. [paper]
[C10]. Grace Gao, DME/TACAN Interference and its Mitigation in L5/E5 Bands, Proceedings of the Institute of Navigation GNSS (ION GNSS 2007), Fort Worth, Texas, Sep 2007. Best Presentation of the Session Award and Student Paper Award. [paper]
[C9]. Grace Gao, David De Lorenzo, Todd Walter and Per Enge, Acquisition and Tracking of GIOVE-A Broadcast L1/E5/E6 Signals and Analysis of DME/TACAN Interference on Receiver Design, ENC Global Navigation Satellite Systems Conference 2007, Geneva, Switzerland, May 2007. [paper]
[C8]. Grace Gao, Seebany Datta-Barua, Todd Walter and Per Enge, Ionosphere Effects for Wideband GNSS Signals, ION Annual Meeting 2007, Cambridge, Massachusetts, Apr 2007. [paper]
[C7]. Grace Gao, David De Lorenzo, Alan Chen, Sherman Lo, Dennis Akos, Todd Walter and Per Enge, Galileo GIOVE-A Broadcast E5 Codes and their Application to Acquisition and Tracking, ION National Technical Meeting 2007, San Diego, California, Jan 2007. [paper]
[C6]. Grace Gao, Jim Spilker Jr., Todd Walter, Per Enge and Anthony Pratt, Code Generation Scheme and Property Analysis of Broadcast Galileo L1 and E6 Signals, Proceedings of the Institute of Navigation GNSS (ION GNSS 2006), Fort Worth, Texas, Sep 2006. [paper]
[C5]. Grace Gao, Zhe Xiang, Hao Wang, Jun Shen, Jian Huang and Song Song, An Approach to Security and Privacy of RFID System for Supply Chain, IEEE International Conference on e-Commerce Technology for Dynamic e-Business 2004, Beijing, China, Sep 2004.
[C4]. Grace Gao, Richard Yao and Zhenming Feng, Hadamard Coded Multi-band UWB, IEEE Semiannual Vehicular Technology Conference (VTC) 2003, Orlando, Florida, Oct 2003.
[C3]. Richard Yao, Grace Gao, Zhengqi Chen and Wenwu Zhu, UWB Multipath Channel Model Based on Time-Domain UTD Technique, IEEE Global Communications Conference GLOBECOM 2003, San Francisco, California, Dec 2003.
[C2]. Grace Gao, Lu Mingquan and Feng Zhenming, Asymmetric Hexagonal QAM Based OFDM System, IEEE International Conference on Communications, Circuits and Systems and West Sino Expositions 2002, Xi'an, China, Jun 2002.
[C1]. Grace Gao, Lu Mingquan and Feng Zhenming, Optimal Wavelet Packet Based Multicarrier Modulation over Multipath Wireless Channels, IEEE International Conference on Communications, Circuits and Systems and West Sino Expositions 2002, Xi'an, China, Jun 2002.